I'm not saying it's the actual story, but the timeline does track.
[0] Page 60, Sec 1306(e) sets the date: https://www.congress.gov/115/bills/hr1/BILLS-115hr1enr.pdf
My argument is simple: Occam’s Razor
The Republicans in congress put the provision in solely as a gimmick to get past the CBO.
Frankly I don’t think legislators in either party are competent enough to have foreseen the consequences and even if they had been they wouldn’t have put a bomb like this in that would be more likely than not to backfire and affect them.
I just think that too often people interpret incompetence as malice, especially nowadays when things are so polarized that it’s fashionable to hate people who differ with one’s political opinions.